Malicious PDF — malware analysis report

Static analysis result for SHA-256 56183a1ce7445a13…

MALICIOUS

PDF

51.4 KB Created: 2020-08-09 15:57:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 18c833882fc5d44389f17f0c43cf3d91 SHA-1: 2ef6dd3fb4881bf0461a209a86e4086bf07b8b27 SHA-256: 56183a1ce7445a137410879b4851459a59fb67c63db79166ec850482683b6a9f
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous links, including one pointing to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, also contains this URL. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' strongly indicates a phishing or redirection attempt. The presence of a link farm suggests an attempt to manipulate search engine results or distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=algae+classification+and+characteristics+pdf In PDF document text
    • http://files.martincleaning.com/uploads/1/3/1/4/131453251/ligijeze.pdfIn PDF document text
    • http://files.businesstriptochina.com/uploads/1/3/0/7/130775640/8631894.pdfIn PDF document text
    • http://jegopate.avalongulley.com/uploads/1/3/1/6/131607600/5974948.pdfIn PDF document text
    • http://files.sargent-thamm.com/uploads/1/3/0/9/130969633/6207205.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9838/3260/files/vutenakurisikavenepe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1872/2207/files/wolapogubepenivugi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3093/6733/files/70928262469.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3145/4119/files/72821371915.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6569/4613/files/jafosasexivop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7248/6564/files/bassoon_fingering_chart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/1263/2221/files/how_to_crop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7490/2430/files/74651884252.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/head_to_toe_assessment_example.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7962/3071/files/nuvibawebuka.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
🗂 Part of campaign: businesstriptochina.com 3 samples

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007e51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E51 5196 bytes
SHA-256: eb46c17e5f8ab4fc890d08f137eefeba3cdeafb9138206ef9e7b74a6e9d52ae2
font_01_sfnt_off00008fe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FE7 10028 bytes
SHA-256: c4fcbc1631a5ad13949be6fbca595def77b001aaeadd95e678f72ba02fde651c
font_02_sfnt_off0000b20e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB20E 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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